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  <title>Document</title>
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  <ol>
    <li>wo shi ol <a href="">dd</a>
    </li>

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  <ul>
    <li>wo shi ul</li>
  </ul>
  <div class="nav">
    <a href="">我是亲儿子</a>
    <p>
      <a href="">我是孙子</a>
    </p>

    <div>熊大</div>
    <p>熊二</p>

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